Read Sharp AL-840 (serv.man7) Service Manual online
(2) Simulation list
a. Main/Sub
Code
Function (Purpose)
Purpose
Section
Item
Main
Sub
1
1
Used to check the operation of the
scanner (reading) unit and its control
circuit.
scanner (reading) unit and its control
circuit.
Operation test/check
Optical (Image
scanning)
scanning)
Operation
5
1
Used to check the operation of the
operation panel display lamps and the
control circuit.
operation panel display lamps and the
control circuit.
Operation test/check
Operation (Display/
Operation key)
Operation key)
Operation
2
Used to check the operation of the
heater lamp and its control circuit. Used
to check the operation of the fan motor
and its control circuit.
heater lamp and its control circuit. Used
to check the operation of the fan motor
and its control circuit.
Operation test/check
Fixing (Fusing)
Operation
3
Used to check the operation of the copy
lamp and its control circuit.
lamp and its control circuit.
Operation test/check
Optical (Image
scanning)
scanning)
Operation
6
1
Used to check the operation of the paper
feed (clutch, solenoid and its control
circuit.
feed (clutch, solenoid and its control
circuit.
Operation test/check
Paper transport
Operation
7
1
Used to check the warm up time and the
operation of all the units and to make
aging with copying. Each section can be
checked during copying.
operation of all the units and to make
aging with copying. Each section can be
checked during copying.
Operation test/check
Others
Operation
2
Used to check the warm up time and the
operation of all the units and to make
aging with copying. Each section can be
checked during copying. (In this
simulation, the detection functions of
paper presence/empty and a paper jam
disabled.)
operation of all the units and to make
aging with copying. Each section can be
checked during copying. (In this
simulation, the detection functions of
paper presence/empty and a paper jam
disabled.)
Operation test/check
Others
Operation
6
Used to check the warm up time and the
operation of all the units and to make
aging (intermittent operation) with
copying. Each section can be checked
during copying.
operation of all the units and to make
aging (intermittent operation) with
copying. Each section can be checked
during copying.
Operation test/check
Others
8
1
Used to check the developing bias
voltage, the main charger voltage, and
the transfer charger voltage and the
operation of their control circuit.
voltage, the main charger voltage, and
the transfer charger voltage and the
operation of their control circuit.
Operation test/check
Image process
(Photoconductor/
Developing/Transfer/
Cleaning)
(Photoconductor/
Developing/Transfer/
Cleaning)
2
Used to adjust and check the operation
of the developing bias voltage, the main
charger voltage, and the transfer charger
voltage, and their control circuit.
of the developing bias voltage, the main
charger voltage, and the transfer charger
voltage, and their control circuit.
Adjustment/
Operation test/check
Operation test/check
Image process
(Photoconductor/
Developing/Transfer/
Cleaning)
(Photoconductor/
Developing/Transfer/
Cleaning)
3
Used to check the operation of each
voltage of the main charger and its
control circuit.
voltage of the main charger and its
control circuit.
Operation test/check
Image process
(Photoconductor/
Developing/Transfer/
Cleaning)
(Photoconductor/
Developing/Transfer/
Cleaning)
14
0
Used to cancel the self diag other than
U2 trouble.
U2 trouble.
Clear/Cancel (Trouble
etc.)
etc.)
Trouble
Error
16
0
Used to cancel the self diag U2 trouble.
Clear/Cancel (Trouble
etc.)
etc.)
Trouble
Error
22
5
Used to check the total counter value.
User data output/Check
(Display/Print)
(Display/Print)
Counter
Total
12
Used to check the print count value of
the photoconductor.
the photoconductor.
Operation data
output/Check
(Display/Print)
output/Check
(Display/Print)
Image process
(Photoconductor/
Developing/Transfer/
Cleaning)
(Photoconductor/
Developing/Transfer/
Cleaning)
Photo
conductor
conductor
Counter
14
Used to check the ROM version.
Others
PCU
Software
21
Used to check the count of use (count of
scanning) of the scanner (reading) unit.
scanning) of the scanner (reading) unit.
Operation data
output/Check
(Display/Print)
output/Check
(Display/Print)
Optical (Image
scanning)
scanning)
Counter
24
7
Used to clear the photoconductor drum
counter.
counter.
Data clear
Image process
(Photoconductor/
Developing/Transfer/
Cleaning)
(Photoconductor/
Developing/Transfer/
Cleaning)
Photo
conductor
conductor
Counter
13
Used to clear the count of use (count of
scanning) of the scanner (reading) unit.
scanning) of the scanner (reading) unit.
Data clear
Optical (Image
scanning)
scanning)
Counter
25
1
Used to check the operation of the main
drive (excluding the scanner (reading)
section) section.
drive (excluding the scanner (reading)
section) section.
Operation test/check
DRIVE
Operation
10
Used to check the operation of the
scanner (writing) motor and its control
circuit.
scanner (writing) motor and its control
circuit.
Operation test/check
Laser (Exposure)
Operation
8 – 3
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